Beating the burn rate for resource and energy recovery from sludge

Traditional methods of managing sludge as a waste product are being challenged by technologies carrying the promise of sludge as a resource for energy and nutrients. What is fuelling the interest?

I t has long been known that sludge is full of valuable commodities and energy potential, however the economics of realising these benefits has rarely added up. Recovery of biogas for energy generation is the notable exception, while recovery of phosphorus from both wet and dry sludge is an area where the economics are at a tipping point. This may be just the beginning: there is growing...